You Can Declare That an Interface Is a Functional Interface

question 51

Multiple Choice

You can declare that an interface is a functional interface by preceding it with the @FunctionalInterface annotation. The compiler will then ensure that the interface contains ________; otherwise, it'll generate a compilation error.

• A) no abstract methods
• B) all abstract methods
• C) only one abstract method
• D) one or more abstract methods.

Describe the tactics and technologies used in World War II.

Understand the outcomes of World War II, including the formation of the United Nations and the beginning of the Cold War.

Analyze the reasons and outcomes of the decisions made at the Yalta Conference.

Understand the methodological aspects and potential biases in online studies.

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Definitions:

Barter Economy

An economic system where goods and services are exchanged directly for other goods and services without using money.

Command Economy

An economic system where the government or central authority makes all decisions related to the production and distribution of goods and services.

Traditional Economy

An economic system rooted in tradition, customs, and beliefs, where resources are allocated based on inheritance and bartering is common, often found in rural and farm-based areas or developing countries.

Opportunity Cost

The cost of forgoing the next best alternative when making a decision or choosing to invest resources in one option over another.